update pkg versions and minor cleanup

[CeresBarros]

• switch to "stable" versions of packages where possible
• figurePath definition no longer necessary after bumping SpaDES.core dependency
• typo fix (not consequential): (sim$)sppColorsVect -> (sim$)sppColorVect

[CeresBarros]

accidentally merged branch outside of PR -- it had been approved anyways, so no biggie